Former state senator David Grubb (pictured with his wife Kate and Obama) shared his daughter Jessica's struggle with addiction during a forum on the opioid abuse epidemic with Barack Obama in West Virginia last October

'I am heartbroken by your daughter's passing,' the letter read. 'I was deeply moved by her story when I visited Charleston and I extend my sincere condolences as you mourn her loss.'

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Jessica had watched her father discuss her addiction on a live stream from rehab on October 21.

Mr Grubb had described how he had begged his daughter 'not to leave us yet' after finding her, with the syringe still in her arm, after her fourth overdose last summer.

He told the forum last year that he understood the pain of addicts' families. His own were terrified that Jessica's next overdose would be her last.

Sadly, those fears came true just a few months later. But Mr Grubb's words stayed with President Obama.

Obama wrote to the 30-year-old addict's grieving family after her death, saying that he was touched by their daughter's tragic story

Sources say that Obama described the meeting as the moment that the true scale of the heroin epidemic hit home.

'He got very emotional,' a White House official said of the president's meeting with Grubb.

'You're in this deep-red [conservative] environment, but people are just opening up their hearts on this. [The president] sort of was taken aback at how candid people were talking about this.'

Despite her battle with the opiate, the 30-year-old's death was unrelated to heroin.

Jessica's death occurred after the addict was prescribed 50 pills of powerful pain medication oxycodone along with an IV port in her arm which made it easier to inject drugs into the blood stream.

The senator's daughter had once been a straight-A student who was passionate about politics and social change and once led a walk out at her Capital High School in protest against the war in Iraq.

'She was an incredible achiever,' he dad said.

Sources say that Obama (pictured hugging Kate Grubb) described the meeting as the moment that the true scale of the heroin epidemic hit home

The senator's daughter (pictured with her mother Kate- had once been a straight-A student who was passionate about politics and social change and once led a walk out at her Capital High School in protest against the war in Iraq

Jessica's death occurred after the addict was prescribed 50 pills of powerful pain medication oxycodone along with an IV port in her arm which made it easier to inject drugs into the blood stream

Jessica went onto study at the University of North Carolina but her promising future came to a tragic end when she was introduced to heron in 2009.

After her death, Mr Grubb shared a message on Facebook thanking everyone who had paid their condolences to the family.

'Nothing can lessen our overwhelming grief and sadness over Jessie's death, but the many letters, cards, and messages from friends and family are truly appreciated,' he wrote.

'This one, from the President, is especially heartwarming,' he said, posting Obama's letter.

Tributes had poured into Jessica, who was described as 'a woman who loved bad puns and running and intricately decorating cookies,' by friend ‎Genny Martin‎.

'She was a woman whose devotion to her disabled sister Emma was testament to her grace and altruism. I wish her life had been as simple as these truths,' she added.

'Rest in peace; dear, dear girl.'

Charlotte Pauley ‎wrote on Facebook: 'You were such a beautiful person inside and out and a great friend!

'We have some great memories together and that I will cherish forever! I know you truly enjoyed life and running! You'll be missed by so many! Love you and miss you dearly girl!'